Sale Low Stock or Special Order. Please contact us to confirm availability and to place order. Cometic Gasket Cometic Gasket PRO1009T Cometic Street Pro GM 1968-76 455ci OLDS Big Block 4.200 Top End Gasket Kit MSRP: Was: $233.03 Now: $216.72 Low Stock or Special Order. Please contact us to confirm availability and to place order.